<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片 -->
    <el-card>
      <!-- 头部的警告区域 -->
      <el-alert title="注意，只允许为第三级分类设置相关参数" type="warning" :closable="false" show-icon> </el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <!-- 选择商品分类级联选择框 -->
          <el-cascader v-model="selectCateKeys" :options="cateList" :props="{ expandTrigger: 'hover', ...cateProps }" @change="handleChange"></el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand"></el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="editView(scope.row.attr_id)">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的面板 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性</el-button>
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand"></el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit" @click="editView(scope)">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数的对话框 -->
    <el-dialog :title="'添加' + titleText" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑对话框 -->
    <el-dialog title="编辑" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'HeimaElementUiParams',

  data() {
    return {
      // 商品分类列表
      cateList: [],
      //   级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 级联选择框双向绑定中的数据
      selectCateKeys: [],
      // 被激活的页签的名称
      activeName: 'many',
      //动态参数的数据
      manyTableData: [],
      // 静态参数的数据
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {},
      addFormRules: {
        attr_name: [{ required: true, message: '请输入参数名称', trigger: 'blur' }]
      },
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        attr_name: [{ required: true, message: '请输入参数名称', trigger: 'blur' }]
      }
    }
  },

  mounted() {},

  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }
      this.cateList = res.data
      console.log(this.cateList)
    },
    // 级联选择框选中变化会触发这个函数
    handleChange() {
      this.getParamsData()
    },
    // tab页签点击事件的处理函数
    handleTabClick() {
      console.log(this.activeName)
      this.getParamsData()
    },
    // 获取参数列表数据
    async getParamsData() {
      //   console.log(this.selectCateKeys)
      //    证明选中的不是三级分类
      if (this.selectCateKeys.length !== 3) {
        this.selectCateKeys = []
        return
      } else {
        // console.log(this.selectCateKeys)
        // 根据所选分类的Id, 和当前所处的面板，获取对应的参数
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败')
        }
        if (this.activeName === 'many') {
          this.manyTableData = res.data
          //   console.log(this.manyTableData)
        } else {
          this.onlyTableData = res.data
        }
      }
    },
    // 静态添加对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮， 添加参数
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        console.log(this.activeName)
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('获取列表失败')
        }
        this.$message.success('添加参数成功')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    editView() {
      this.editDialogVisible = true
    },
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 点击按钮, 修改信息
    async editParams(id) {
      // 查询当前参数的信息
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${id}`, { params: { attr_sel: this.activeName } })
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('获取信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = false
    }
  },
  computed: {
    // 如果按钮需要被禁用，则返回true, 否则返回false
    isBtnDisabled() {
      if (this.selectCateKeys.length !== 3) {
        return true
      } else {
        return false
      }
    },
    // 当前选中的三级分类的id
    cateId() {
      if (this.selectCateKeys.length === 3) {
        return this.selectCateKeys[2]
      }
      return null
    },
    // 动态计算标题的文本
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    }
  },
  created() {
    this.getCateList()
  }
}
</script>

<style lang="scss" scoped>
.cat_opt {
  margin: 15px 0;
}
</style>
